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Submission #556574

# Submission time Handle Problem Language Result Execution time Memory
556574 2022-05-03T11:29:36 Z eecs Izbori (COCI22_izbori) C++17
110 / 110
 1529 ms 14448 KB 
#include <bits/stdc++.h>
using namespace std;

const int maxn = 200010;
int n, a[maxn], sum[maxn], c[maxn * 2];
long long ans;
map<int, vector<int>> mp;

void add(int p) {
    for (p += maxn; p < maxn * 2; p += p & -p) c[p]++;
}

int query(int p) {
    int s = 0;
    for (p += maxn; p; p -= p & -p) s += c[p];
    return s;
}

int main() {
    scanf("%d", &n);
    for (int i = 1; i <= n; i++) {
        scanf("%d", &a[i]), mp[a[i]].push_back(i);
    }
    auto calc = [&](int x, int y, int lim) {
        int t = min(x, max(0, y - lim));
        return (2LL * lim + t + 1) * t / 2 + 1LL * (x - t) * y;
    };
    for (auto &p : mp) {
        auto &pos = p.second;
        if (pos.size() <= 700) {
            for (int i = 0; i < pos.size(); i++) {
                for (int j = i; j < pos.size(); j++) {
                    int l = (i ? pos[i - 1] : 0) + 1;
                    int r = (j + 1 < pos.size() ? pos[j + 1] : n + 1) - 1;
                    int lim = 2 * (j - i);
                    ans += calc(pos[i], r, lim) + calc(l - 1, pos[j] - 1, lim);
                    ans -= calc(l - 1, r, lim) + calc(pos[i], pos[j] - 1, lim);
                }
            }
        } else {
            memset(sum, -1, sizeof(sum));
            for (int x : pos) {
                sum[x] = 1;
            }
            for (int i = 1; i <= n; i++) {
                sum[i] += sum[i - 1];
            }
            memset(c, 0, sizeof(c));
            for (int i = 1; i <= n; i++) {
                add(sum[i - 1]), ans += query(sum[i] - 1);
            }
        }
    }
    printf("%lld\n", ans);
    return 0;
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:31:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |             for (int i = 0; i < pos.size(); i++) {
      |                             ~~^~~~~~~~~~~~
Main.cpp:32:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |                 for (int j = i; j < pos.size(); j++) {
      |                                 ~~^~~~~~~~~~~~
Main.cpp:34:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |                     int r = (j + 1 < pos.size() ? pos[j + 1] : n + 1) - 1;
      |                              ~~~~~~^~~~~~~~~~~~
Main.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
Main.cpp:22:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         scanf("%d", &a[i]), mp[a[i]].push_back(i);
      |         ~~~~~^~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct

Subtask #2
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 3 ms 340 KB Output is correct
14 Correct 4 ms 340 KB Output is correct
15 Correct 2 ms 340 KB Output is correct
16 Correct 3 ms 340 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 24 ms 3824 KB Output is correct
2 Correct 35 ms 4072 KB Output is correct
3 Correct 19 ms 3576 KB Output is correct
4 Correct 33 ms 4168 KB Output is correct
5 Correct 31 ms 4260 KB Output is correct
6 Correct 34 ms 4380 KB Output is correct
7 Correct 45 ms 4360 KB Output is correct
8 Correct 34 ms 4288 KB Output is correct
9 Correct 34 ms 4424 KB Output is correct
10 Correct 36 ms 4308 KB Output is correct
11 Correct 27 ms 4252 KB Output is correct

Subtask #4
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 212 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 0 ms 212 KB Output is correct
9 Correct 3 ms 340 KB Output is correct
10 Correct 2 ms 340 KB Output is correct
11 Correct 3 ms 340 KB Output is correct
12 Correct 3 ms 340 KB Output is correct
13 Correct 3 ms 340 KB Output is correct
14 Correct 4 ms 340 KB Output is correct
15 Correct 2 ms 340 KB Output is correct
16 Correct 3 ms 340 KB Output is correct
17 Correct 2 ms 2644 KB Output is correct
18 Correct 24 ms 3824 KB Output is correct
19 Correct 35 ms 4072 KB Output is correct
20 Correct 19 ms 3576 KB Output is correct
21 Correct 33 ms 4168 KB Output is correct
22 Correct 31 ms 4260 KB Output is correct
23 Correct 34 ms 4380 KB Output is correct
24 Correct 45 ms 4360 KB Output is correct
25 Correct 34 ms 4288 KB Output is correct
26 Correct 34 ms 4424 KB Output is correct
27 Correct 36 ms 4308 KB Output is correct
28 Correct 27 ms 4252 KB Output is correct
29 Correct 37 ms 4316 KB Output is correct
30 Correct 19 ms 4244 KB Output is correct
31 Correct 52 ms 7564 KB Output is correct
32 Correct 154 ms 14448 KB Output is correct
33 Correct 48 ms 7944 KB Output is correct
34 Correct 60 ms 8252 KB Output is correct
35 Correct 43 ms 5708 KB Output is correct
36 Correct 25 ms 3792 KB Output is correct
37 Correct 19 ms 4364 KB Output is correct
38 Correct 56 ms 4584 KB Output is correct
39 Correct 63 ms 4316 KB Output is correct
40 Correct 55 ms 4372 KB Output is correct
41 Correct 56 ms 4360 KB Output is correct
42 Correct 55 ms 4540 KB Output is correct
43 Correct 103 ms 4880 KB Output is correct
44 Correct 115 ms 4680 KB Output is correct
45 Correct 116 ms 4760 KB Output is correct
46 Correct 117 ms 4556 KB Output is correct
47 Correct 105 ms 4724 KB Output is correct
48 Correct 1529 ms 4484 KB Output is correct
49 Correct 1505 ms 4488 KB Output is correct
50 Correct 621 ms 5036 KB Output is correct
51 Correct 630 ms 4940 KB Output is correct
52 Correct 474 ms 2036 KB Output is correct
53 Correct 527 ms 1944 KB Output is correct
54 Correct 1497 ms 4372 KB Output is correct